/*
 * Copyright 2008. Mount Sinai Hospital, Toronto, Canada.
 * 
 * Licensed under the Apache License, Version 2.0. You
 * can find a copy of the license at:
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * IN NO EVENT SHALL MOUNT SINAI HOSPITAL BE LIABLE TO ANY PARTY FOR DIRECT, 
 * INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST 
 * PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, 
 * EVEN IF MOUNT SINAI HOSPITAL HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH 
 * DAMAGE.
 * 
 * MOUNT SINAI HOSPITAL SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF 
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE AND 
 * ACCOMPANYING DOCUMENTATION, IF ANY, PROVIDED HEREUNDER IS PROVIDED "AS IS". 
 * MOUNT SINAI HOSPITAL HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, 
 * UPDATES, ENHANCEMENTS, OR MODIFICATIONS. 
 */

package com.sinai.mshab.data.core;

/**
 * The generic interface to be used for data management of UI elements in a GWT
 * application.
 * 
 * @author Arthur Kalmenson
 * 
 * @param <T>
 *            the type of widget being managed.
 * @param <S>
 *            the type of data the widget uses.
 */
public interface DataManager<T, S> {

	/**
	 * Returns the data in {@code widget}.
	 * 
	 * @param widget
	 *            the GWT widget who's data we are getting.
	 * @return the data in {@code widget}.
	 */
	public S getData(T widget);

	/**
	 * Sets the data of {@code widget} to {@code data}.
	 * 
	 * @param widget
	 *            the GWT widget to set.
	 * @param data
	 *            the data for the widget.
	 */
	public void setData(T widget, S data);
}
